A radio station is located due south of your location. It uses an electric dipole antenna oriented horizontally north-south. In order to maximize reception of this broadcast at your location, you need to orient an electric dipole receiving antenna:(A) vertically. (B) horizontally north-south. (C) horizontally east-west. (D) (No reception is possible using an electric dipole antenna.)

Correct answer (highlight to unhide): (D)

An electric dipole antenna will broadcast most effectively in all directions perpendicular to its orientation, which for this horizontal north-south antenna would be to the east and to the west of its location (as well as directly overhead, or anywhere in the sky along an east-to-west line). There would be zero signal broadcast to the north and to the south of the antenna, as those locations would be looking at the antenna end-on, and there would be no detectable transverse oscillations.